Ask yourself, how quickly does a rocket get to an altitude greater than that of Virgin Atlantic?
It may seem that the rocket is getting energy for free, which would violate conservation of energy.
If they're as far off as I think, their rockets would never get above our horizon.
The rocket got the missile up to speed, then dropped away.
The cells expanded because of trapped water and air as the rocket got faster.
Their own rockets got most of the rest.
The only question was whether the rocket or the Mercedes would get there first.
There are several different types of launch site, determined by the means by which the rocket gets to the pad.
At shorter range, with less time available, a rocket might get through!
The Executioner had to get the helicopter before the rocket got them.